Biot系数非线性解释初探及其在井壁稳定性分析中的应用

Biot系数在钻井工程、压裂工程等方面具有重要应用价值，目前常用的测井解释Biot系数公式依赖于全波测井，推广性有限。考虑颗粒岩及结晶岩受力变形机制，在岩心试验测试结果的基础上，利用广义Usher模型建立起Biot系数解释方法。利用该模型，结合测井数据，计算得到单井岩石力学及地应力参数剖面，与实钻资料吻合情况良好，表明该Biot系数评价方法有一定的推广应用价值。

Preliminary study on non-liner interpretation of biot coefficient of rock and its application on the analysis of wellbore stability

The Biot coefficient has an important application value on the drilling engineering & fracturing engineering.The equation,which is used for the log interpretation of Biot coefficient,is dependent on all-wave logging,so its spread is limited.Based on the results of core tests,taking the deformation mechanism of grain-rock and chemical crystallized rock,the interpretation method for Biot coefficient is presented utilizing the broad sense Usher model,and the profiles of rock mechanics and in-situ stress parameters calculated by this model are coincident with the drilling data based on the log data.That means,this model is valuable for spreading application.